Lovejoy 68514436161 Flexible Coupling Hub 1.75in Bore

Product Description

The LOVEJOY 68514436161 is a flexible coupling hub designed for use in power transmission systems where vibration dampening and minor misalignment compensation are required. This cast iron hub features a maximum bore diameter of 1.75 inches and accepts a 0.375-inch wide by 0.1875-inch deep keyway for positive shaft engagement. With an outer diameter of 6.35 inches and an overall length of 5.06 inches, it is sized for demanding industrial and commercial drive applications. Licensed mechanical professionals and industrial maintenance technicians are the primary installers. Rated to 3,750 RPM maximum, it suits moderate- to high-speed shaft coupling assemblies.

This flexible coupling hub is suited for industrial drive train assemblies, HVAC equipment, pumps, compressors, and other rotating machinery where torsional flexibility and misalignment tolerance are needed. The cast iron construction handles heavy-duty loads in both commercial and light industrial environments. It is intended for use as one half of a complete flexible coupling assembly, paired with a matching hub and a flexible insert or spider element appropriate to the coupling size code 9S.

Key Features

• Maximum bore diameter of 1.75 inches accommodates a range of shaft sizes
• Keyway slot measures 0.375 inches wide by 0.1875 inches deep for keyed shaft connections
• Cast iron construction provides durability under high-torque and heavy-load conditions
• 6.35-inch outer diameter and 5.06-inch overall length for size code 9S coupling assemblies
• Rated to 3,750 RPM maximum for moderate- to high-speed applications
• Sold individually as a single hub unit

Compatibility

Designed for use in flexible coupling assemblies corresponding to coupling size code 9S. Pair with a matching 9S hub and a compatible flexible insert or spider element to complete the coupling assembly. Confirm bore size, keyway dimensions, and RPM requirements before installation.

Installation Notes

Installation should be performed by a qualified mechanical technician or millwright. Disconnect and lock out all power to the drive system before beginning work, following applicable OSHA lockout/tagout procedures. Ensure shaft and bore surfaces are clean and free of burrs before pressing or sliding the hub onto the shaft. Verify alignment of both coupled shafts after assembly to avoid premature wear on the flexible insert.